High lead-bronze alloy and method of manufacturing the same



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Patented May llll, T926.

entree stares httitfitt WILLIAM E. DAY, 33, OF NEW BRUNSWICK, NEW JERSEY, ASSTG HOR T9 INTTrfiNA- TIODLQL EOTQE.

HIGH LEAD-BRONZE ALLOY life matting.

This invention relates to an alloy which possesses high bearing qualities and will run for long periods without lubrication and without causing any or other element journaled therein, and the method of so manufacturing the same as to insure the desired physical properties.

While it will be understood that some latitude is to be allowed: to one skilled in the art in the percentages employed with respect to the main ingredients and also as to the temperature employed and the technique used it has been found in practice that an alloy of high lead bronze comprising, in general, the following ingredients will satisfy the requirements of use Lead 20-25%, tin 740% and the valance copper.

The amount of tin, in general, will depend on the hardness desired. v

In the course of manufacturing a-deoxidizer is employed and this, of course, carries small amounts of nickel, zinc and phosphorus, or other elements into the main ingredients.

The preferred method employed in the manufacture of the, compound is to melt down the copper and then add the lead and bring the whole to 2700 F. Tt has been found that by raising the mixture to a temperature approaching or perhaps exceeding the boiling point of lead, the lead tends to assume a very finely divided state approaching almost a collodial condition, and to become evenly dispersed throughout the alloy. This condition is preserved more or less in the alloy after solidification. The tin is then added, and a small quantity of a suitable deoxidizer, consisting, for instance, of zinc, nickel, copper and phosphorus, is added to the extent of approximately two percent (2%) of the entire mass. About comranr, or new roan, 1a. 17.,

Application filed. October :20, 1923.

cutting of the shaft.

CUE'EORATION 0E DELA- AND METHOD 01 MANUFACTURING THE SAM- E.

serial Etc. 669,709.

one percent (1%) more of this deoxidizer is placed in the bottom of a hot pouring ladle and the metal from the furnace is then to poured in the ladle. The mixture is then thoroughly stirred and the dross skimmed from the top after which it is poured in molds. After the alloy has been made by heating to a temperature of substantially to 27 00 F. the temperature of the mass may be permitted to drop to temperature suitable for pouring.

As indicated hereinbefore the alloy thus formed possesses high bearing qualities, re- 65 quires little lubrication and will not cut the element journaled therein. Ordinary departures with respect to the ingredients and method of manufacture may be resorted to by one skilled in the art without avoiding 60 the substance of the invention.

What I claim is:

1. The herein described method of manufacturing a bearing alloy consisting in combining lead and copper and bringing the as whole to at least 27 00 F, then-adding tin and a small quantity of a deoxidizer, pouring the mass into a hot pouring ladle, and introducing the metal into molds.

2. The herein described method of manu- 70 facturing a bearing alloy consisting in melting down copper, adding lead, bringing the whole to 2700 R, then adding tin and a small quantity of a deoxidizer consisting of I zinc, nickel, copper and phosphorus to the it amount of approximately two percent of the entire mass, pouring the metal into a hot ladle containing one percent more of the deoxidizer skimming and introducing the alloy into molds.

This specification signed this 16 day of Oct. A. D. 1923.

7 WILLIAM E. DAY, Jr. 

